小编Kin*_*cel的帖子

# 代码如下，实现了，但结果可能是错误的，不是我想要的灰度，有人帮我解决，看起来很简单，但我就是不知道哪里错了

import cv2 import matplotlib.pyplot as plt import numpy as np import matplotlib.image as mpimg img = cv2.imread('calibration_test.png')

# i want simply convert the rgb image to grayscale and then print it out
gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
plt.imshow(gray)
print(gray.shape)
# but the outcome is a colorful image